keystore

Hello I’m trying to use de SOAP web service connector(6.2.4) to consume a secure service (user and password required) I put all the needed configurations in the connector but I’m receiving this error:
sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
It seems to be the SSL certificate, so I include the server (where the service is running) certificate in the cacert of my jdk and jre, but still don’t work.